The first episode is really special. It explains the basics of aerodynamics, biplanes, monoplanes,evolution of piston engines and reason for swept back wings. Really takes us back in time, makes many things clear. The design choice and the logic behind the looks of su-27 and itÂ´s derivatives becomes crystal clear. Infinitately better than the crappy discovery channel "documentories", most of which are little better than glossy ad campaigns for American weapons. Extremely educational indeed, very good experience.